Pipe-truing lathe



No Model) 'Y C. S. HAB/KUN# PIPE TRUING LTHE.

No. 585,865. Patented July 6,1897.

ff l /2 //2 Fily-j` rml /NVENTOR d6. Hama@ TTRNEYS UNITED STATES PATT OFFICE. l

CHARLES S. IIAll'ILIN, 0F LOS ANGELES, CALIFORNIA. i

PIPE-rauwe LATHE.

SPECIFICATION forming part of Letters Patent No. 585,865, dated July 6, 1897.

Application filed January 23, 1897. Serial No. 620,400. (No modeld l .To all whom t may concern.-

Be it known that I, CHARLES S. IIAMLIN, a citizen of the United States, residing at-Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Pipe Truing Lathes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improved form of cutter and lathes for truing the ends of sheet-metal pipes; and myinvention consists in certain features of novelty hereinafter described and claimed.

^ Figure I represents a side elevation of my improved device. Fig. II is a transverse scction taken on line Il 1I, Fig. I. Fig. 'III represents an'end elevation of the pipe-cradle. Fig. IV is an end view of my improved cutter. Fig. V is a section of the cutter, taken on line V V, Fig. IV.

Referring to the drawings, 1 represents a frame or bed of a lathe on which the pipecradle 2 travels.

3 represents the lower section of the cradle, which rests firmly on the frame l, there being notches 4 in the base of the cradle, which rest upon parallel/ribs 5 on the upper side of the frame, the cradle th us being held in proper alinement.

(irepresents the upper section of the cradle, `said section being hinged at 7 to the lower section 3 by means of two bolts 7 extending through the sections, having their heads pivoted together and their ends secured to the sections by nuts 7l. The sections of the cradle are eut out in their center to form a circular aperture 8, in which the pipe 9 rests. In placing the pipe in position the upper section of the cradle is thrown'backward, as shown in dotted lines in Fig III, the pipe then being placed in the cradle, after which the section 6 is thrown over the top of the pipe, as shown in full lines in Fig. III, and securely held in positioil by means of a clamp 1 0. The clamp 10 is made in the form of an open link having its lower ends' pivoted to theupper part of a bolt 11, said bolt being secured to the section 3 of the cradle by a nut 11n. After theclamp 10 has been thrown into a vertical position, as shown in full lines in Fig. III,

and passing over the outer end of the section (i of the cradle it is securely held there by means of a cam-lever 12,- the cam-lever 12 being pivoted at 13 to the top of the link lO, there being a bearing-plate 14 on the top of the section G of the cradle, against which the cam bears in locking the two parts of the cradle together, thus securely clamping the pipe, the clamp being iirmly set by merely throwing the cam-lever over in a horizontal position, as shown in full lines in Fig. III.

15 represents a rack on the under side of the upper part of the frame 1, with which meshes a gear-wheel 16, the shaft of the gearwheel 16 being journaled in an apron 17, depending from the lower side or base of the cradle. On theoppositc end of the shaft from the gear-wheel is placeda crank 18 for operating the gear-wheel and moving the carriage back and forth.

19 represents achuck mounted upon a shaft 20, said shaft being journaled in a frame 21, said frame 21 resting upon the main frame 1. The chuck is'providcd with annular series of cutters of peculiar construction.

My improved cutter consists-of a vertical .disk 22, having a circumferential groove 23 near its outer end, and a cutting-facel 24.

25 represents a circular aperture through the center of the cutting-disk, and 26 a circular recess near the outer face of the cutting-disk, said recess being of greater diameter than the aperture 25.

27 represents a bolt for securing the cutting-disk to the chuck, said bolt having a spindle 28 thereon of somewhat larger diameter than the body of the bolt 27 and having a circular head 29rthereon`, which is again larger than the spindle 2S. The width of the `head 29 is slightly less than the depth of the aperture`26, so as to permit the cuttingface 24 to extend a short distance beyond the end of the head 29.

30 represents anI annular series of holes in the chuck 19, into which the bolt 27 is placed for securing the cutting-disk? The holes 30 are arranged in a series of concentric circles,

so as to allow for any diameter of pipe it is desired to operate upon.

31 represents aradial-pin extending a short distance fromthe edge of the bolt 27,- and 32 represents a series of radial slots extending IIOO from um Sides of the holes 3o. when the bolt 27 is placed in position, the pin 3'] will elnter said slots and hold the same from tu'rning while the nut 34 is being screwed into pov sition. The cutting-disk 22 provides aleentinuous circular cutting-face which rcvoi ves astheedge of the pipe is being trimmed into true, thus presenting a long cutting-face which gives when too great an obstruction is l ing, as in the ordinary fixed cutters.

I claim as my invention-- 1. A cutter comprising a bolt formed with a spindle of greater diameter than the body and with a head of greater diameter than the spindle, aradial pin secured to the body, adjacent to the spindle, a disk formed/With a circular recess receiving the head, with a circular opening of less diameter receiving the spindle,

l with a cutting-tace, and with a circnmferer tial groovein rear of the cutting-face, and

, nut threaded onto the body of the bolt; sul

stantially'as described.

2'. A chuck comprising a series of concer tric circles of circular holes having radis slots and cutters each havingna body ad apte to lit in the circular holes and provided wit radial pins adapted to engage in the radii slots; substantially as described.

3. A cradle comprising a base, lower se( tions, upper sections, bolts extending throug the ends of the lower/sections whereby the are secured to the base, the bolts extendin through the inner ends of the upper section and pivoted to the bolts of the inner ends c the lower sections, the links pivoted to th bolts of the outer ends of the lower sections and' embracing thel outer ends of the uppe sections and the cam-levers pivoted to th links; substantially as described.

CHARLES s. HAMLI'N.

Witnesses:

'.T. W. KEMP, t J. E. KNIGHT. 

